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首页> 外文期刊>Environmental Science & Technology >A New Group of Disinfection Byproducts in Drinking Water: Trihalo-hydroxy-cyclopentene-diones
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A New Group of Disinfection Byproducts in Drinking Water: Trihalo-hydroxy-cyclopentene-diones

机译：饮用水中的消毒副产物的新类别：三卤代-羟基-环戊烯-二酮

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摘要

We report the detection, synthesis, preparative isolation, structure characterization and identification, and formation of a new group of drinking water disinfection byproducts (DBPs): trihalo-hydroxy-cyclopentene-diones (trihalo-HCDs). With ultra performance liquid chromatography (UPLC)/electrospray ionization-triple quadruple mass spectrometry analyses (full scans, multiple reaction monitoring, and product ion scans) and high-resolution mass spectrometry analyses (full scans), the new group of DBPs was identified with formulae and proposed with structures. However, due to a lack of commercially available standard compounds, structure identification of this new group of DBPs was challenging. 2,4,6-Trihydroxybenzaldehyde was found to be a good precursor for the synthesis of tile tribromo species (m/z 345/347/349/351) in the new group of DBPs by reacting with bromine at a 2,4,6-trihydroxybenzaldehyde-to-bromine molar ratio of 1:8. With UPLC/photodiode array analysis (simultaneous 2- and 3-dimensional operations), the new DBP was determined to have a maximum UV absorption at the wavelength of 280 nm. Through isolation with high performance liquid chromatography/UV-triggered collections followed by ryophilization, the pure standard of the new DBP was obtained. Characterized with Fourier transform infrared spectroscopy, the pure standard of the new DBP was finally identified to be tribromo-HCD, and thus the new group of DBPs was identified to be trihalo-HCDs. On the basis of the disclosed structure, formation pathways of tribromo-HCD through reactions of three different precursors and bromine were proposed and partially verified. Moreover, increasing the bromide level in source water shifted the formation of trihalo-HCDs from being more chlorinated to being more brominated; with an increase in the contact time from 1 h to 5 d, the formation of trihalo-HCDs kept increasing in chloramination, whereas they kept decreasing in chlorination; with an increase in the pH from 6.0 to 8.5, the formation of trihalo-HCDs was decreased by ～80%. Notably, the concentrations of tribromo-HCD in eight Chinese tap water samples were from below the detection limit to 0.53 μg/L.
机译：我们报告了检测，合成，制备性分离，结构表征和鉴定，以及一组新的饮用水消毒副产物（DBPs）的形成：三卤代-羟基-环戊烯-二酮（trihalo-HCDs）。通过超高效液相色谱（UPLC）/电喷雾电离三重四极杆质谱分析（全扫描，多反应监测和产物离子扫描）和高分辨率质谱分析（全扫描），新的DBP被鉴定为公式和结构建议。但是，由于缺乏可商购的标准化合物，这一组新的DBP的结构鉴定具有挑战性。通过在2,4,6与溴反应，在新的DBP中发现2,4,6-三羟基苯甲醛是合成瓷砖三溴物种（m / z 345/347/349/351）的良好前体-三羟基苯甲醛与溴的摩尔比为1：8。通过UPLC /光电二极管阵列分析（同时进行二维和三维操作），确定新的DBP在280 nm波长处具有最大的UV吸收。通过用高效液相色谱/紫外触发收集物分离，然后进行冻干，获得了新DBP的纯标准品。用傅立叶变换红外光谱法表征，新的DBP的纯标准品最终被鉴定为三溴HCD，因此，新的DBP组被鉴定为三卤代HCD。基于所公开的结构，提出并部分验证了通过三种不同前体与溴的反应形成三溴环十二烷的形成途径。此外，源水中溴化物含量的增加将三卤代六溴环十二烷的形成从更多的氯化转变为更多的溴化。随着接触时间从1 h增加到5 d，三卤代HCD的形成在氯化过程中持续增加，而在氯化过程中却持续减少。随着pH值从6.0增加到8.5，三卤代HCD的形成减少了约80％。值得注意的是，八份中国自来水样品中的三溴六溴环十二烷浓度从检测限以下降至0.53μg/ L。

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  • 来源
    《Environmental Science & Technology》 |2016年第14期|7344-7352|共9页
  • 作者

    Yang Pan; Wenbin Li; Aimin Li; Qing Zhou; Peng Shi; Ying Wang;

  • 作者单位

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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